Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Cherry Creek, CO

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:51AMSunset 7:18PM Saturday March 25, 2017 5:28 PM MDT (23:28 UTC) Moonrise 5:36AMMoonset 4:49PM Illumination 3% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Cherry Creek, CO
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location: 39.64, -104.86     debug


Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 252150
afdbou
area forecast discussion
national weather service denver/boulder co
350 pm mdt Sat mar 25 2017

Short term (this evening through Sunday)
issued at 350 pm mdt Sat mar 25 2017
an upper level low that just crossed the southern nv/ut
borderlines has spread its cirrus shield over the state. As the
system pushes closer to the forecast area and as surface pressure
falls along the lee of the rockies, southeasterly surface winds
are increasing. The upper low and surface low will deepen over
southeastern colorado tomorrow morning, helping to wrap moisture
into northeastern colorado overnight. A few showers will move into
the mountains this evening with snow levels starting around 9500
feet. Instability and increasing upward QG motion will help a few
rain showers spread over the plains later this evening. The main
cold front should push through the high country this evening then
out onto the plains after midnight. Snow levels are expected to
drop to near 7-7.5k feet with some rain/snow mix down to 6500
before sunrise. As the low spins over southeastern colorado Sunday
morning, slightly cooler temperatures are expected to be pulled
down to bring snow levels possibly down to 6000 feet or slightly
lower. Overall, not expecting snow for most of the metro areas,
with less than an inch of snow for the palmer divide and less for
the cheyenne ridge. Some snow over the far eastern plains with
richer moisture and colder temperatures away from any downsloping
effects should result in amounts less than an inch as well.

As the system pulls away Sunday, upward QG motion will push east
as well, for a slow pull away of the precipitation. Northwesterly
flow aloft behind the low will keep light snow over the mountains,
for a total of 2 to 6 inches over the 24 hours. Temperatures
should be about 10 degrees colder. Moderate northerly winds on
the backside of the system will gust in the 20 to 35 mph range
over the plains during the morning and early afternoon.

Long term (Sunday night through Saturday)
issued at 350 pm mdt Sat mar 25 2017

Active weather pattern will remain in place this upcoming
week...

upper level trough will continue to push east and out of the area
Sunday evening. Airmass will stabilize with any lingering showers
ending during the evening.

Attention will then turn toward next upper level storm system
digging into the southwestern u.S. Monday night and Tuesday. The
models seem to have slowed a bit more over the past 24 hours. In
advance of this system, we should see a round of convective
showers develop with daytime heating and sufficient moisture
Monday afternoon and night. A lead short wave kicking out ahead of
the main upper level trough may also help increase shower
coverage. At this time, most of the showers are expected to
develop over the mountains in the afternoon and then spread
northeast across the foothills and nearby adjacent plains through
Monday evening, while the eastern plains may stay dry.

Tuesday and Tuesday night, a closed low is expected to cut off in
eastern arizona, and then drift slowly eastward into new mexico
through Wednesday. There is large scale lift ahead of this system,
but given the low is so far south, the forecast area stays in
generally weak but persistent q-g lift. Precipitable water values
of 0.5 to 0.6 inch across the plains are abnormally high, and
forecast lapse rates are neutral to slightly unstable. Therefore,
any type of forcing whether from q-g or a light upslope flow
should be enough to generate widespread showers. Will also add
some thunder with forecast CAPE near 500 j/kg Tuesday afternoon in
and near the mountains. The wet weather should continue into
Wednesday before tapering off from northwest to southeast across
the area. Overall, this looks like a moderate precipitation event
shaping up across most of the forecast area. Snow levels are
advertised to be quite high with the very moist airmass in place
and lack of significant cold advection. Expect snow levels to
mostly range between 7500 and 8500 feet through this period,
possibly lowering to 6000-6500 feet by Wednesday morning with some
snow on the palmer divide area.

After that storm system exits the area, we'll have a day or so of
drier weather and near normal temperatures for Thursday. Then the
next storm system may bring unsettled weather back into the
picture by late Friday or Saturday. This storm may end up farther
south but will still have above climatology pops and cooler
temperatures in the forecast for this period with a trough around.

Aviation (for the 18z tafs through 18z Sunday afternoon)
issued at 350 pm mdt Sat mar 25 2017
vfr conditions are expected at denver area air terminals through
tonight before a system pushes in. South- southeast winds of 5-15
kts will prevail through this evening before turning drainage
briefly, before a cold frontal passage after 09z where
northwesterly winds should blow for a few hours before trending
north-northeasterly and increase in speed Sunday morning. Ceilings
are expected to lower to around 6000-7000 ft agl closer to sunrise
and a 30-40 percent chance of rain showers. Ceilings will lower
even more to around 3000-4000 ft agl after 12z. Showers are
expected to stay rain, except at apa where rain may mix with snow
as temperatures drop to near freezing. Snow accumulation is
expected to remain under half an inch, and occur mainly early to
mid morning.

Bou watches/warnings/advisories
None.

Short term... Kriederman
long term... Barjenbruch
aviation... Kriederman


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO6 mi35 minSSE 910.00 miMostly Cloudy56°F27°F33%1010.3 hPa
Buckley Air Force Base Airport, CO9 mi90 minSE 1410.00 miOvercast60°F11°F15%1009 hPa
Denver, Denver International Airport, CO18 mi35 minE 1110.00 miMostly Cloudy59°F19°F21%1008.3 hPa
Denver Nexrad, CO20 mi41 minE 1010.00 miMostly Cloudy59°F23°F25%1011.5 hPa
Broomfield / Jeffco, CO23 mi41 minE 11 G 1545.00 miMostly Cloudy63°F12°F14%1011.2 hPa

Wind History from APA (wind in knots)
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Last 24hrE4CalmSW8S5S6S6SE6S6S5SE4SE6SE7SE4SE6SE4SE7S8S7SE8S11SE10S14S13SE9
1 day agoW13
G21
W12
G21
NW6N17
G28
N24
G32
N19
G36
N24
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N23
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N16
G24
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N18
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N15
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N13
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NE10
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N10E11
2 days agoN6NE5S11S11S17
G23
S16S12S12S11SE7S8W9SW12SW13S10S12SW13
G22
SW16
G27
SW16
G23
S21
G30
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G37
SW27
G40
SW20
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SW12
G21

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralPlains    EDIT
Geos

Wind Forecast for Denver/Boulder, CO (19,4,5,8)
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Ground Weather Radar Station Denver/Boulder, CO
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.